The study of the thermally expanded core technique in end-pumped (N+1)×1 type combiner

Juan Wu; Yinhong Sun; Yanshan Wang; Tenglong Li; Yujun Feng; Yi Ma

doi:10.1117/12.2065298

3 February 2015 The study of the thermally expanded core technique in end-pumped (N+1)×1 type combiner

Juan Wu, Yinhong Sun, Yanshan Wang, Tenglong Li, Yujun Feng, Yi Ma

Proceedings Volume 9255, XX International Symposium on High-Power Laser Systems and Applications 2014; 92550I (2015) https://doi.org/10.1117/12.2065298
Event: XX International Symposium on High Power Laser Systems and Applications, 2014, Chengdu, China

Abstract

Tapering will raise the signal loss in an end-pumped (N+1)×1 type combiner. In this paper, the Thermally Expanded Core (TEC) technique is used in the signal loss optimization experiment with the tapering ratio of the pump combiner is 0.6. The experimental results indicate that the coupling efficiency of the 1.55μm signal light increases from 81.1% to 86.6%, after being heated 10 minutes at the homo-waist region of the tapered signal fiber with an 8mm wide hydroxygen flame. Detail analysis shows that the TEC technique can both reduce the loss of the LP01 mode and the LP11 mode in the signal fiber.

Citation Download Citation

Juan Wu, Yinhong Sun, Yanshan Wang, Tenglong Li, Yujun Feng, and Yi Ma "The study of the thermally expanded core technique in end-pumped (N+1)×1 type combiner", Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 92550I (3 February 2015); https://doi.org/10.1117/12.2065298

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